Prevalence of risk factors of stroke
| Category | Subcategory | Hypertension, % (95% CI) | Dyslipidaemia, % (95% CI) | Diabetes, % (95% CI) | Atrial fibrillation, % (95% CI) | Smoking, % (95% CI) | Overweight or obesity, % (95% CI) | Lack of exercise, % (95% CI) | FHS, % (95% CI) |
| Overall | 48.7 (47.7 to 49.6) | 42.8 (41.8 to 43.7) | 15.4 (14.7 to 16.1) | 3.7 (3.4 to 4.1) | 13.2 (12.5 to 13.8) | 43.0 (42.0 to 44.0) | 29.4 (28.5 to 30.3) | 3.7 (3.3 to 4.0) | |
| ASR | 41.8 (40.1 to 43.0) | 44.6 (43.3 to 45.8) | 12.0 (11.3 to 12.7) | 2.3 (2.0 to 2.6) | 15.0 (14.1 to 15.9) | 40.8 (39.6 to 42.1) | 33.7 (32.6 to 34) | 4.3 (3.8 to 4.8) | |
| Age (years) | 40–49 | 31.5 (29.4 to 33.6)* | 43.9 (41.6 to 46.1)* | 7.4 (6.3 to 8.6)* | 1.3 (0.8 to 1.8)* | 17.0 (15.3 to −18.7)* | 38.2 (36.0 to 40.4)* | 39.5 (37.3 to 41.7)* | 4.8 (3.8 to 5.8)* |
| 50–59 | 47.8 (46.0 to 49.6) | 50.5 (48.7 to 52.3) | 12.0 (10.8 to 13.1) | 1.5 (1.1 to 1.9) | 15.3 (14.0 to 16.6) | 41.1 (39.4 to 42.9) | 32.7 (31.0 to 34.3) | 5.5 (4.7 to 6.3) | |
| 60–69 | 53.5 (51.5 to 55.4) | 48.5 (46.5 to 50.4) | 20.2 (18.6 to 21.8) | 1.5 (1.1 to 2.0) | 13.3 (12.1 to 14.6) | 42.9 (41.0 to 44.8) | 26.7 (25.0 to 28.4) | 3.3 (2.6 to 4.0) | |
| 70–79 | 57.6 (55.4 to 59.9) | 30.0 (27.9 to 32.1) | 21.5 (19.6 to 23.4) | 8.2 (7.0 to 9.5) | 7.6 (6.4 to 8.8) | 49.5 (47.3 to 51.8) | 20.7 (18.9 to 22.6) | 1.0 (0.5 to 1.4) | |
| ≥80 | 58.4 (54.6 to 62.2) | 16.4 (13.5 to 19.2) | 18.1 (15.1 to 21.1) | 17.5 (14.5 to 20.4) | 7.3 (5.3 to 9.3) | 48.2 (44.4 to 52.1) | 20.4 (17.3 to 23.5) | 0.6 (0 to 1.2) | |
| Sex | Male | 48.7 (47.2 to 50.1) | 42.5 (41.1 to 44.0) | 17.3 (16.2 to 18.4)* | 3.8 (3.3 to 4.4) | 28.4 (27.1 to 29.7)* | 45.8 (44.4 to 47.3)* | 29.3 (27.9 to 30.6) | 3.5 (3.0 to 4.1) |
| Female | 48.6 (47.3 to 50.0) | 42.9 (41.6 to 44.2) | 13.8 (12.9 to 14.7) | 3.7 (3.2 to 4.2) | 1.0 (0.7 to 1.2) | 40.8 (39.5 to 42.1) | 24.3 (22.3 to 24.5) | 3.8 (3.3 to 4.3) | |
| Residence | Low-altitude | 46.0 (44.2 to 47.7)* | 41.7 (40.0 to 43.5)* | 26.0 (24.4 to 27.5)* | 0.9 (0.6 to 1.3)* | 9.9 (8.8 to 11.0)* | 49.7 (47.9 to 51.4)* | 29.6 (28.0 to 31.2)† | 2.7 (2.1 to 3.3)* |
| Mid-altitude | 55.1 (53.7 to 56.5) | 60.2 (58.8 to 61.6) | 13.2 (12.4 to 14.2) | 0.8 (0.5 to 1.0) | 18.2 (17.1 to 19.3) | 30.9 (29.6 to 32.2) | 26.9 (25.6 to 28.0) | 5.4 (4.8 to 6.1) | |
| High-altitude | 38.0 (35.9 to 40.0) | 4.4 (3.6 to 5.3) | 5.1 (4.1 to 6.0) | 14.6 (13.1 to 16.1) | 6.4 (5.4 to 7.5) | 61.2 (59.1 to 63.3) | 31.6 (29.7 to 33.6) | 1.0 (0.6 to 1.4) | |
| Ethnicity | Han | 52.1 (50.9 to 53.3)* | 54.4 (53.2 to 55.6)* | 17.5 (16.6 to 18.4)* | 0.9 (0.6 to 1.1)* | 16.3 (15.4 to 17.2)* | 35.1 (34.0 to 36.2)* | 27.7 (26.7 to 28.8)* | 4.8 (4.3 to 5.4)* |
| Tibetan | 39.0 (37.0 to 41.0) | 6.8 (5.8 to 7.9) | 5.5 (4.5 to 6.4) | 13.8 (12.3 to 15.0) | 7.0 (5.9 to 8.0) | 60.6 (58.6 to 62.6) | 31.5 (29.6 to 33.0) | 1.1 (0.6 to 1.5) | |
| Hui | 45.6 (42.2 to 49.1) | 46.4 (42.9 to 49.8) | 26.2 (23.1 to 29.2) | 0.2 (0.0 to 0.6) | 2.0 (1.0 to 3.0) | 57.0 (53.6 to 60.4) | 35.7 (32.3 to 39.0) | 1.5 (0.7 to 2.3) | |
| Other | 52.6 (47.6 to 57.6) | 46.9 (41.9 to 51.9) | 14.1 (10.6 to 17.5) | 0.8 (0.0 to 1.7) | 18.8 (14.8 to 22.7) | 47.9 (42.9 to 52.9) | 32.6 (27.9 to 37.2) | 2.9 (1.2 to 4.5) |
P values, intragroup comparison in different factors, were calculated with the Rao-Scott-χ2 test.
*Significant at p<0.001.
†Significant at p<0.05.
ASR, age-stanardised rate; FHS, family history of stroke.